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Daily Summary for 18 January 2007

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Weather Summary — Flight Summary — Satellite Images — Surface Observations — Model Analyses — Radiosonde Soundings

Weather Summary

High pressure moved through the region during the overnight hours and lingered over Ottawa until late in the day. Behind it was another storm system approaching from the west. Southwest flow warmed things up somewhat today. There was enough instability for some lake effect cloud cover and a few snow showers, particularly later in the day.

The next storm system had multiple layers of moisture out ahead of it, which moved over southeastern Ontario during the afternoon. This included some nice mid-level clouds, but they were all capped by cirrus.

Flight Summary

CLEX is looking for isolated mid-level clouds, not ones with overriding cirrus, and with no CloudSat overpass it was decided to not fly today and focus our efforts on tomorrow's storm and CloudSat overpass.

Satellite Images

GOES-12 IR courtesy of RAP @ UCAR

GOES-12 Visible (during daylight hours) and Near IR (night) albedo from CIRA.

GOES-12 IR (10.7 µm) brightness temperature from CIRA. The color scale begins at 0 °C with an increment of -10 °C between color changes.

GOES-12 experimental cloud phase from CIRA. Blue represents ice particles, red is liquid droplets above freezing and yellow represents supercooled liquid droplets. Gray areas are clear (no cloud) based on an IR cloud mask.